Car comparison

Porsche 911 Cabriolet (991) Carrera 4S 3.8vsPorsche 718 Boxster (982) GTS 4.0

Compare specs, acceleration, fuel consumption, dimensions, practicality, and estimated running costs side by side.

New comparison

Porsche 911 Cabriolet (991)

Carrera 4S 3.8

400 hp3800 ccGasolineAWDManualNaturally aspiratedCabriolet / convertible2012-2015
VS

Porsche 718 Boxster (982)

GTS 4.0

400 hp3995 ccGasolineRWDManualNaturally aspiratedCabriolet / convertible2020-present

Comparison overview

Use the estimates as comparison hints and verify exact figures before making decisions.

Best choices

Porsche 911 Cabriolet (991) Carrera 4S 3.8

  • Fastest top speed
    296 km/h
    184 mph
  • Most powerful
    400 hp
    298 kW
  • Highest torque
    440 Nm
    325 lb-ft
  • Lowest combined fuel consumption
    10.0 L/100 km
    23.5 mpg US
    28.2 mpg UK
  • Lowest city consumption
    13.9 L/100 km
    16.9 mpg US
    20.3 mpg UK
  • Lowest highway consumption
    7.7 L/100 km
    30.5 mpg US
    36.7 mpg UK
  • Lowest CO2 emissions
    235 g/km
  • Best estimated range
    680 km
    423 mi
  • Largest trunk
    285 L
  • Best overall score
    66/100
  • Best economy score
    80/100
  • Best practicality score
    44/100

Specification comparison

Specification comparison
ModelPorsche911 Cabriolet (991)Carrera 4S 3.8Porsche718 Boxster (982)GTS 4.0
Power
400hp298kW
400hp298kW
Torque
440Nm325lb-ft
420Nm310lb-ft
Curb weight
1,535kg3,384lb
1,405kg3,097lb
Gross weight
1,935kg4,266lb
1,700kg3,748lb
Top speed
296 km/h
184 mph
293 km/h
182 mph
To 99% top speed
67.3s99% target: 293 km/h / 182 mph
Calculated
67.7s99% target: 290 km/h / 180 mph
Calculated
0-100 km/h
4.7s
4.5s
0-200 km/h
14.2s
Calculated
14.1s
0-60 mph
4.5s
Calculated
4.3s
Calculated
Fuel consumption
10L/100 km23.5mpg US28.2mpg UK
10.8L/100 km21.8mpg US26.2mpg UK
Fuel consumption city
13.9L/100 km16.9mpg US20.3mpg UK
14.7L/100 km16mpg US19.2mpg UK
Fuel consumption highway
7.7L/100 km30.5mpg US36.7mpg UK
8.5L/100 km27.7mpg US33.2mpg UK
Quarter mile
12.6s
Calculated
12.5s
Calculated
Power-to-weight
261hp/t194kW/t118hp/1000 lb
Calculated
285hp/t212kW/t129hp/1000 lb
Calculated
Torque-to-weight
287Nm/t192lb-ft/ton
Calculated
299Nm/t200lb-ft/ton
Calculated
Estimated range
680km423mi
Calculated
593km368mi
Calculated
Displacement
3,800cc232cu in
3,995cc244cu in
Length
4,491mm177in
4,391mm173in
Width
1,852mm73in
1,801mm71in
Height
1,294mm51in
1,262mm50in
Wheelbase
2,450mm96in
2,475mm97in
Front track
1,538mm61in
1,527mm60in
Rear track
1,552mm61in
1,535mm60in
Trunk volume
285L
120L
Doors
2
2
Seats
4
2
Fuel tank
68L
64L
CO2 emissions
235g/km
246g/km

Performance charts

Use the estimates as comparison hints and verify exact figures before making decisions.

Dyno simulation

Estimated stock-style power and torque curves by engine speed.

Porsche 911 Cabriolet (991) Carrera 4S 3.8Porsche 718 Boxster (982) GTS 4.0PowerTorque
  • Porsche 911 Cabriolet (991) Carrera 4S 3.8: Power / Torque
  • Porsche 718 Boxster (982) GTS 4.0: Power / Torque
Dyno simulation data table
VehiclePeak power RPMPeak torque RPMMax engine speed
Porsche911 Cabriolet (991)Carrera 4S 3.87,400 rpm5,600 rpm7,650 rpm
Porsche718 Boxster (982)GTS 4.07,000 rpm5,000-6,500 rpm7,800 rpm

Acceleration curve

Estimated speed over time for selected vehicles.

Acceleration and drag-race table
MetricPorsche911 Cabriolet (991)Carrera 4S 3.8Porsche718 Boxster (982)GTS 4.0
Acceleration checkpoints
0-60 mph
0-97 km/h
4.5 s
4.3 s
0-100 km/h
0-62 mph
4.7 s
4.5 s
0-200 km/h
0-124 mph
14.2 s
14.1 s
Top speed
296 km/h
184 mph
293 km/h
182 mph
Drag race simulation
60 ft
18 m
2.2 s
2.1 s
330 ft
101 m
5.6 s
5.5 s
1/8 mile
201 m
8.4 s
8.2 s
1000 ft
305 m
10.7 s
10.5 s
1/4 mile
402 m
12.6 s
12.5 s
Trap speed
1/4 mile
402 m
188 km/h
117 mph
188 km/h
117 mph

Power comparison

Bar comparison chart for Power. Higher is better · hp / kW

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
400 hp
298 kW
Porsche718 Boxster (982)GTS 4.0
400 hp
298 kW

Torque comparison

Bar comparison chart for Torque. Higher is better · Nm / lb-ft

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
440 Nm
325 lb-ft
Porsche718 Boxster (982)GTS 4.0
420 Nm
310 lb-ft

Curb weight comparison

Bar comparison chart for Curb weight. Lower is better · kg / lb

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
1,535 kg
3,384 lb
Porsche718 Boxster (982)GTS 4.0
1,405 kg
3,097 lb

Top speed without limiter comparison

Bar comparison chart for Top speed without limiter. Higher is better · km/h / mph

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
296 km/h
184 mph
Porsche718 Boxster (982)GTS 4.0
293 km/h
182 mph

0-100 km/h comparison

Bar comparison chart for 0-100 km/h. Lower is better · seconds

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.84.7 s
Porsche718 Boxster (982)GTS 4.04.5 s

The biggest 0-100 km/h difference is between Porsche 718 Boxster (982) GTS 4.0 and Porsche 911 Cabriolet (991) Carrera 4S 3.8: 0.2 s.

Fuel consumption comparison

Bar comparison chart for Fuel consumption. Lower is better · L/100 km / mpg US / mpg UK

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
10.0 L/100 km
23.5 mpg US
28.2 mpg UK
Porsche718 Boxster (982)GTS 4.0
10.8 L/100 km
21.8 mpg US
26.2 mpg UK

The biggest fuel consumption difference is between Porsche 911 Cabriolet (991) Carrera 4S 3.8 and Porsche 718 Boxster (982) GTS 4.0: 0.8 L/100 km.

Power-to-weight comparison

Bar comparison chart for Power-to-weight. Higher is better · hp/t / kW/t

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
261 hp/t
194 kW/t
3.8 kg/hp
Porsche718 Boxster (982)GTS 4.0
285 hp/t
212 kW/t
3.5 kg/hp

Estimated range comparison

Bar comparison chart for Estimated range. Higher is better · km / mi

Chart data table
VehicleValue
Porsche911 Cabriolet (991)Carrera 4S 3.8
680 km
423 mi
Porsche718 Boxster (982)GTS 4.0
593 km
368 mi

Performance spider chart

Radar chart comparing normalized performance and fuel-consumption scores.

Chart data table
VehiclePowerAccelerationTop speed
Porsche911 Cabriolet (991)Carrera 4S 3.8
400 hp
298 kW
4.7 s
296 km/h
184 mph
Porsche718 Boxster (982)GTS 4.0
400 hp
298 kW
4.5 s
293 km/h
182 mph

Most attractive quadrant

Scatter chart with performance score on the X axis and practicality score on the Y axis.

Chart data table
VehiclePerformance scorePracticality score
Porsche911 Cabriolet (991)Carrera 4S 3.8
Power
400 hp
298 kW
0-100 km/h4.7 s
Top speed
296 km/h
184 mph
Doors/seats
2 doors
4 seats
Trunk
285 L
10.1 cu ft
Length
4,491 mm
176.8 in
Height
1,294 mm
50.9 in
Porsche718 Boxster (982)GTS 4.0
Power
400 hp
298 kW
0-100 km/h4.5 s
Top speed
293 km/h
182 mph
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,391 mm
172.9 in
Height
1,262 mm
49.7 in

Performance vs fuel economy

Cars closer to the top-right corner combine stronger performance with better fuel economy scores.

Performance vs fuel economy data table
VehiclePerformance scoreFuel economy score
Porsche911 Cabriolet (991)Carrera 4S 3.8
Power
400 hp
298 kW
0-100 km/h4.7 s
Top speed
296 km/h
184 mph
10.0 L/100 km
23.5 mpg US
28.2 mpg UK
Porsche718 Boxster (982)GTS 4.0
Power
400 hp
298 kW
0-100 km/h4.5 s
Top speed
293 km/h
182 mph
10.8 L/100 km
21.8 mpg US
26.2 mpg UK

Porsche 911 Cabriolet (991) Carrera 4S 3.8 is closest to the top-right balance target for performance and fuel economy.

Acceleration vs fuel consumption

Cars closer to the lower-left corner offer a better mix of quick acceleration and low fuel consumption.

Acceleration vs fuel consumption data table
VehicleFuel consumption, L/100 km0-100 km/h, s
Porsche911 Cabriolet (991)Carrera 4S 3.8
10.0 L/100 km
23.5 mpg US
28.2 mpg UK
4.7 s
Porsche718 Boxster (982)GTS 4.0
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
4.5 s

Power-to-weight vs fuel consumption

The shaded area favors higher power-to-weight with lower combined fuel consumption.

Power-to-weight vs fuel consumption data table
VehiclePower-to-weight, hp/tFuel consumption, L/100 km
Porsche911 Cabriolet (991)Carrera 4S 3.8
261 hp/t
194 kW/t
3.8 kg/hp
10.0 L/100 km
23.5 mpg US
28.2 mpg UK
Porsche718 Boxster (982)GTS 4.0
285 hp/t
212 kW/t
3.5 kg/hp
10.8 L/100 km
21.8 mpg US
26.2 mpg UK

Detailed score breakdown

Detailed score breakdown
VehiclePorsche911 Cabriolet (991)Carrera 4S 3.8Porsche718 Boxster (982)GTS 4.0
Power
400 hp
298 kW
400 hp
298 kW
Torque
440 Nm
325 lb-ft
420 Nm
310 lb-ft
Acceleration
4.7 s
4.5 s
Top speed
296 km/h
184 mph
293 km/h
182 mph
Lightness
1,535 kg
3,384 lb
1,405 kg
3,097 lb
Fuel consumption
10.0 L/100 km
23.5 mpg US
28.2 mpg UK
10.8 L/100 km
21.8 mpg US
26.2 mpg UK
Practicality
Doors/seats
2 doors
4 seats
Trunk
285 L
10.1 cu ft
Length
4,491 mm
176.8 in
Height
1,294 mm
50.9 in
Doors/seats
2 doors
2 seats
Trunk
120 L
4.2 cu ft
Length
4,391 mm
172.9 in
Height
1,262 mm
49.7 in
Range score
680 km
423 mi
593 km
368 mi
CO2 score
235 g/km
246 g/km
Trunk score
285 L
10.1 cu ft
120 L
4.2 cu ft
Power-to-weight score
261 hp/t
194 kW/t
3.8 kg/hp
285 hp/t
212 kW/t
3.5 kg/hp
Overall
Fixed score
Fixed score

Fuel cost and annual usage

Estimate running costs from combined consumption, your annual distance, and the fuel price in your local currency.

Enter the fuel price in your local currency, for example €/L, $/gal, £/L or any other local currency.

LC = Local Currency

Fuel cost and annual usage
VehiclePorsche 911 Cabriolet (991) Carrera 4S 3.8Porsche 718 Boxster (982) GTS 4.0
Consumption10 L/100 km23.5 mpg US28.2 mpg UK10.8 L/100 km21.8 mpg US26.2 mpg UK
Cost / 100 km17.50 LC100 km18.90 LC100 km
Cost / 100 mi28.16 LC100 mi30.42 LC100 mi
Annual fuel used1,500 L396 US gal330 UK gal1,620 L428 US gal356 UK gal
Annual fuel cost2,625 LC/year2,835 LC/year

Head-to-head comparisons

Porsche 911 Cabriolet (991) Carrera 4S 3.8

  • Has 20 Nm more
  • Has 3 km/h (2 mph) higher top speed
  • Uses 0.8 L/100 km less fuel
  • Has 87 km (54 mi) more estimated range
  • Has 165 L more trunk volume
  • Emits 11 g/km less CO2

Pros

  • Highest top speed
  • Most powerful
  • Highest torque
  • Lowest combined fuel consumption
  • Best estimated range
  • Largest trunk

Cons

  • Slowest 0-100 km/h
  • Heaviest

Porsche 718 Boxster (982) GTS 4.0

  • Is 130 kg lighter
  • Is 0.2 s quicker from 0-100 km/h
  • Has 24 hp/t better power-to-weight

Pros

  • Quickest 0-100 km/h in this comparison
  • Lightest
  • Best power-to-weight ratio

Cons

  • Highest combined fuel consumption
  • Lowest top speed
  • Smallest trunk
  • Highest CO2 emissions

Choose cars to compare

Brand
Model
Generation
Engine or modification
Porsche 911 Cabriolet (991) Carrera 4S 3.8
Porsche 718 Boxster (982) GTS 4.0
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